Servizio Comunitario di Informazione in materia di Ricerca e Sviluppo - CORDIS

Comprehensive nonlinear aeroelastic tools for the analysis of wind turbines

A comprehensive non-linear aeroelastic tool is developed at NTUA. With this model, the aeroelastic problem of the complete wind turbine configuration is considered, within the context of advanced aerodynamic and structural modeling. Aerodynamics is accounted for by a 3D free-wake vortex method instead of the commonly used blade element momentum model, while a 2nd order non-linear beam model is used in formulating the structural dynamic equations instead of the linear classical beam theory. The two are non-linearly coupled and time-domain simulations are performed which through signal processing can provide information on the stability characteristics of the complete construction. Assessment of the significance non-linearities have on stability is carried out through comparisons with results obtained from different linear models while comparisons with full scale measurements on a multi MW machine validate the theoretical developments.

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